A1458 Optocoupler Datasheet -

) Range: Adapts flexibly from to match common 3.3V logic platforms and standard 5V TTL systems. Current Consumption ( ICCcap I sub cap C cap C end-sub

The A1458 is a specialized, high-reliability optocoupler housed in a standard dual-in-line package (DIP) or surface-mount package (SMD). It features an infrared (IR) light-emitting diode (LED) on the input side optically coupled to a high-gain photodetector or phototransistor on the output side.

A structured overview of the device's technical specifications and applications is detailed below. 💡 High-Level Device Summary

Available in hermetic versions (HCNW1458) for high-reliability military or aerospace applications. Primary Applications HCPL-A1458 | In Stock | Utsource

The is one of the most important specifications in any optocoupler datasheet. It is defined as the ratio of the output transistor's collector current to the input LED's forward current, expressed as a percentage. A CTR of 15% to 30% means that for a given input current, the output will sink a current that is 15% to 30% of that value. This is a key parameter for ensuring the optocoupler can properly drive the input of the following logic gate or microcontroller. a1458 optocoupler datasheet

Providing feedback from the secondary side to the primary side without a direct wire connection.

This simple mechanism creates an electrical barrier. The input side controls the output side via light, not copper. Therefore, there is no direct electrical connection between your high-voltage side and your low-voltage logic.

The is a testament to the idea that simple components can solve complex problems. By understanding the parameters in its datasheet—specifically the isolation voltage and CTR—you can design robust circuits that stand up to high voltages and electrical noise.

The photodetector senses the light and generates electron-hole pairs, allowing current to flow through the collector-emitter junction. This changes the voltage status on the output pin, effectively replicating the input signal without an electrical link. Key Applications ) Range: Adapts flexibly from to match common 3

The A1458 is frequently referenced by its more complete Avago/Broadcom part numbers: (the most common version) and HCPL-A1458 (another variant). These devices are renowned for their exceptional high-speed performance, low power consumption, and high noise immunity.

While exact parameters vary between specific production runs and packaging formats (such as the SOP-8 hermetic package), standard values outlined in the A1458 datasheets represent the following operating characteristics: Typical Value / Spec Context & Importance Broad logic compatibility, safe for battery power. Propagation Delay High-speed response, preserving duty cycle control. Output Type Open Collector / Gate Driver Capable of sinking/sourcing current for power switches. Packaging Hermetically Sealed SOP-8 Extreme durability against environmental pollutants. Isolation Barrier Standard High-Voltage Protects microcontrollers from high power spikes.

To safely use the A1458, you must correctly calculate the input current-limiting resistor ( Rincap R sub i n end-sub ) and the output pull-up resistor ( Rpullcap R sub p u l l end-sub Step 1: Calculate the Input Resistor ( Rincap R sub i n end-sub

The HCPL-1458 is classified as a high-speed optocoupler. Its data sheet will specify a (e.g., 15 Mbps) and typical propagation delay figures (e.g., 45 ns). This makes it suitable for applications requiring fast signal transmission, such as digital communication interfaces and high-frequency switching power supplies. It is defined as the ratio of the

IC=IF×CTR=10mA×1.0=10mAcap I sub cap C equals cap I sub cap F cross CTR equals 10 mA cross 1.0 equals 10 mA

The A1458 is an optically coupled isolator consisting of a GaAsP LED and an integrated high-gain photodetector. It is designed for high-speed logic gate isolation and is commonly used in industrial and telecommunication environments to provide galvanic isolation while maintaining signal integrity. Specification Speed (Propagation Delay) 8 ns max (tPHL/tPLH) Isolation Voltage Supply Voltage (VCC) 3.0V to 5.5V Common Mode Rejection (CMR) 50 kV/µs minimum Current Consumption (ICC) 1.2 mA max (Low power) Operating Temperature -40°C to +105°C (Extended range) Package Types 8-Pin DIP, SOIC-8 / SOP-8 Core Features

The A1458 is functionally equivalent to the industry-standard PC817 . However, the A1458 often features tighter CTR binning and slightly better high-temperature dark current performance.